Auxiliary feeding attachment



3 Sheefs-Sheet l Dec. 14, 1948. w. JOHNDREW AUXILIARY FEEDING ATTACHMENT Filed Feb. 29, 1944 l xNvENToR WILBUR JOHNDREW BY @MM5 Mayw.

ATTORNEYS Dec. 14, 1948. w. .JoHNDREw AUXILIARY FEEDING ATTACHMENT 3 Sheets-Sheet 2I Filed Feb. 29, 1944 INVENTOR NW .R E D m m m A m. am m W Dec. 14, 1948. w, JOHNDR-Ew 5 2,456,126

AUXILIARY FEEDING ATTACHMENT I ATTORNEYS Patented Dec. 14, 1948 UN-fl TED ;S TAT ES NT OFFICE ,456,1- zsY A'UXlLlARY;EEEDINGATIACHMENT Wilbur Johndrewgiiffalf, Z v'Application February 29, 1944; 'Serial No. '524,423

9 claims. (c1. .ns- 48.)

,ll/ly invention relates; in fgeneral to auxiliary .ieed'irig devices as applied .to riveting machines .andinparticular to .-a device for automatically fee-ding the jbucking `toolgor riveting anvil as it is 53.63.18 frloved. to .its operative yposition .in underheath an yangtilarly Rar-ranged or overhanding flangecf aworkpiece, .as -for instance, the cap.-

,strip o flan airplane spar.y

p -fpthe Ariveting machine.

' 1L-)further `object has abeen togorovide -a :compensating .device .carriedby thecylinder of ,the machine `forfcontrpll-ing .thelateral feeding means .thereof and. for iassociation Witha templet device vs o that relative .axial movement oflthet ram .with

irliion to the cylinder wil-l cause lateral ..move. .r

men-t ofi-the rar-n and .cylinder :withrespect to the workpiece..

A 'notlier -obi eet has. been. to provide .a templet .device having interchangeableguide..bars where- ;byfa separate gui-debar `may -be initially prepared fier each workpiece tobefriveted, andquickly ,and easily; inserted ateny :desired time.

T e above lcls iects r,and advantageshave been ac cmplished by the ,accompanying drawingsrof which:

Iigql shows a fragmentary side elevation .of a riveting machine` with my device in rposition thereon.

Eig. 2 isv fa fragmentary sectional elevation .thereof taken ,on line,II-.I I of Fig. A,1.

VFig. 3 is Ya fragmentarysectional elevation taken; on line III- T111 .of Fig.` .1.,

Fig. 4 :is: anr enlarged..front .elevation .oflmy ideyice.

is a plan View thereof.

Fig. 6 is an end elevation thereof.. 1,

is ,an -en-largedplanvview ofthetemplet .device of; my attachinent.k ,Eig-,arise sectional eleva-tion `ofthe .temnlet ,device-taken on line VIIIfVIII of Fig. 7.

Fig. 9 is `an Aenlarged View of. the lateral. feeding rnechanismior the =bucking..tco1.,and riveting anvil off-. tl1e riveting machine ,withwhich my invention. is used.

Fig. 10 'isr a .diagrammatic `view showingthe electric circuits or" my device.

Asg'shown-in-:Figs 1, -2 and 3 my .inventionis .applicable to ,a .riveting machine having .a rivet ,in giunit ,land a;buckingunit l. The riveting -unit .isrgrnounted upon the transverse ways `2l) lextendinglongitudinallyof the machine. The bucking vunitis movable over :longitudinal ways di, extending 4longitudinally vof `.the machine. Ihisiunit 4is held.- vertically zwhen not lin use -or when :being1 adjusted.A 'by rmeans of supporting angle V22; carried b y the Ways -2 I and engaged. by rollers 23 carried -by`ithe-`head= lllV of .the unit. The units vare gmoved, preferably in unison, by vrneznfis-of a feed motor .25. This motor iscon.- :nected'to -the feed 7gearsf.".,6 A,and .by means of drive 4shafts 3 l one ,extending upwardly .and the iotlierextending downwardly from l the motor. flhefgieed gear 3.0fis. non-rotatably `mounted upon a drive-sleeve 4132', which is,ir 1terioral1 y screwithreadedto.engagethe unit feedscrew 33. There are, of courseftwolfeed screws provided, `one for the; bucking'nnitiand-,the other for the riveting unit. The dniveisleeye .of-.each .of thefeedfscrews is rotatably vmounted against axial movement Within suitableantiffriction bearings 34. The sleeves andi-shafts..fare passed through suitable .openingsgformediinthe, end plate 35.01? the housin-g or theriveting machine.

My auxiliary `attachment comprises a compensabine;.deviceg31-carried:by the. ram cylinder and .the Worktable tor ycontrolling the lateral movements, oiisadcylinder,..and a templet device y38 :carriedxby .the ram of .the machine. The attach#- ment may 'be carried by either the bucking. ,unit 4Lili .on rivetingunit l5. For `convenienceof illus- -itratiom :myvinventionfis illustrated vas applied .to the; buckngnnit lofv themachine, .and will .hereiaifter.V loe vr'described Y, in .connection therewith, it :heling obvious that:.thedevice isalso applicable :lor use in connection with the riveting unit. The cftmlpensating device comprises a. mounting :pla-tende;.Which-'is secured to the lcylinder 4.I-.r QA mmmtigng bracket .Ally is .-slidably supported by the mcriintingv plate,...andV vhasits longitudinal edges mountedbet-ween rollers43 carried by the mounting Plate'. The .'nf1o11nting..y bracket is provided witha .longitudinal slot 44.*Which engages. a stop pi y45 carriedby the fmounting'plate, whereby the @mounting :bracket..-wi11 .be prevented from .-beeoming disengaged fromv the ,.rollersA?, during dits.glongitudinalmovement A helical spring 46, having.. ,one end rengaged WithL a .pin 50 .carried by.` themountingplatew, and its other end enaged by a pin. carried by the mounting bracket; servesto keep the bracket urged-to the left asshownin Fig. 41.k

lMounted forV oscillation upon the mounting p1ece. f may be provided for each workpiece and the proper bar may be quickly inserted in the guide. The bar slipper carries a bullet catch 96 having ja head 91 for engagement with either of the yrecesses 95.

bracket 42 is a rocker arm 5|, which is mounted upon trunnion bearings 52. This arm is kept urged in clockwise direction by means of a helical spring 53, having one end bearing against an arm 54 of a bracket 55 and the other end bearing against the upper end of the rocker arm. The bracket 55, which is carried by the mounting bracket 42, is provided with an arm 56 at the opposite side of the rocker arm which carries an adjustable stop screw 60, for limiting the clockwise movement of the rocker arm. The rocker arm carries an adjustable rocker arm rod 6| which passes therethrough and which has a plurality of semi-circular recesses 62 formed therein for engagement with a detent pin 63. This pin is carried by a spring plate 64, secured at one end to one side of the rocker arm which serves to keep the pin engaged with the selected groove, but should it be desired to adjust the vertical relationship of the rocker arm and rod, the'rod may be pushed axially to bring another groove in registration with the pin 63. The rocker arm carries a roller 65 at its lower end which engages with a guide angle 66 carried by the work 'table 61 of the riveting machine and which is `kept in contact therewith by means of the spring 53.

This guide angle which extends substantially parallel with the rivet pattern of the cap-strip of the spar 1|, thus providing a fixed member force-operation with the roller 65 of the rocker `14 being secured to the other side thereof. The

switches are arranged preferably equidistantly on each side of the trunnion bearings 52 of the rocker arm, and the rocker arm is provided with adjusting screws and 16, for engagement with thevswitches 13 and 14, respectively. These screws are preferably mounted upon a screw plate 80 carried by the rocker arm.

The templet device 38 of my invention is secured to the ram 8| of the riveting machine, and compris-es a stationary guide 82 having an attaching flange 83 for securement to a plate 84 carried by the ram. Slidably carried by this guide is a bar slipper 85. The slipper is held in place by means of slipper plates 86 secured to the back face of the slipper and each engaging a recess 90 formed in theback face of 4the stationary guide. The stationaryguide is provided with a longitudinal groove 9| in which is mounted a gauge bar 92. This gauge bar is :limited in its inward movement along the groove jpasses through the stationary guide and the gauge bar. The gauge bar is formed with a plurality of recesses 95 arranged at predetermined points and in accordance with the various laterally arranged operating stations on the work- By this arrangement a separate gauge bar This catch is mounted within a sleeve |00 carried by the slipper and has an index knob |0| secured to its outer end whereby it V,may be moved axially. A spring |02 is mounted ,within a recess workpiece having differently located lateral stations is to be operated upon, the gauge bar 92 may be removed by withdrawing the retaining pin 94, and replaced by a bar having apertures arranged in accordance with the workpiece.

As shown in Fig. 4, the upper flange |04 of the cap-strip 10 overhangs the inner rivet |05, so that the bucking tool |08 cannot be moved downwardly in a vertical plane but must be moved inwardly as it approaches the rivets. The final inward position of the tool when engaged with the heads of the rivets is shown in dot and dash lines. The bucking tool |08, as shown, is relieved on the side facing the flange |04 of the cap-strip 10 whereby itwill clear this flange when the tool engages the rivets |05. In order to accomplish the lateral movement of the bucking tool as the ram 8| is moved downwardly I employ a templet bar |05 which is carried by the slipper 85, This bar is mounted in a recess |01 formed in the slipper and extends upwardly therefrom, It is adjustable and clamped in position by means of a clamp screw ||0. The right hand edge of the templet bar is provided with operating surfaces ||3 and ||4 which engage with a templet roller carried by the mounting bracket. These surfaces are held firmly against the roller by means of the spring 46, and a spring clip H2 is carried by the templet roller stud in resilient engagement with the left hand edge of the templet bar, whereby it is kept in proper alignment. The operating surface ||3 of the templet bar is located in the plane spaced from the plane in which the surface I4 is located and joined thereto preferably by an inclined surface |5 so that as the templet bar is moved downwardly in relation to the roller l the roller will ride across the inclined surface I5 from the surface I4 tothe surface H3. During such movement the mounting bracket 42 will be moved to the left in the mounting plate 40 under the tension of the spring 46 and as it is so moved the rocker arm 6| will be oscillated slightly in counter-clockwise direction upon its trunnions 52 due to the engagement of the roller with the guide angle 66, thereby causing the switch 13 to be closed. This switch is so connected in the control circuit as to cause the cylinder and ram to be moved to the right until the bucking tool has been moved to the position where it will occupy the dot and dash line position shown in Fig. 4, at which time the rocker arm with its rod will be in neutral position. Such movement may be continuous or increment by increment each movement serving to bring the rocker arm again to its neutral position whereby the lateral movement of the cylinder and ram will be stopped. Ii, when the rocker arm has reached its neutral position, the templet roller has not yet reached the surface ||3, further downward movement cf the ram will cause further movement of the mounting bracket and consequent repeated operation of the switch 13. Consequently, as the bucking tool is being moved downwardly it is also being moved inwardly until it comes to its final position shown in the clot and dash lines.

Obviously, when the bucking tool is elevated to disengage the workpiece, the templet bar will travel along the roller and cause it to move up the incline |5 from the surface I3 to the surface |4; and, as it does so, the mounting bracket will be moved relatively to the mounting plate and thereby cause clockwise rotation of the rocker arm on its trunnions. This will operate the switch 14 to cause the mounting bracket 42 and .5 its as'sociatedparts to be moved to the left as viewed in Fig.' 4, thereby moving the anvil |08 laterally so that, as :it is elevated, it will clear the flange |04. i

Referring now to Fig. 10 where I show my device connected in a suitablev electric circuit, the feed motor'25, which is of the reversing type, is diagrammatically represented. Since the bucking unit must'beoperated in opposite directions, two contactors |20 and |2| are'provided for actuating, the motor. The contactor |20 Vis provided with Aan `operating coil |22, and the con- -tactor |2| is provided with an operating coil |23. Three normally open contacts |24, |25 and |26 areprovidedion` the contactor |20, and three normally 'open contacts 30, |3| and |32 are provided on the contactor |2|. The .power lines are represented at |33, |34 and |35. The contacts |24v and |30 are connected -to the power line |33; the contacts |25 and |3| are connected to the power line |34; and contacts |26 and |32 are connected to the power line |35. The contacts |24, |25 and |26 are connected by suitable leads to the motor 25 for operation thereof in one direction,vand-th e contacts |30, I3| and |32 are connected to the motor for operation thereof in reverse direction. The operating coils |22 and |23 of the contactors |20 and |2|, respectively each receivejcurrent from the power line |35. The switches |3Jand 14 are represented in the diagram andeach has one of itsv terminals connected to a common point |43 which, in turn, is connected to the power line |33. The other terminals |44 and |45 of these switches are connected respectively to the opposite sideof the operating coils |22 and |23. When the rocker .arm 5| is oscillated in counter-clockwise direction, the switch 13 will be closed as hereinbefore described, and when the rocker arm is moved in clockwise direction, the switch 14 will be closed,.thus actuating the contacter to which this actuating switch is connected. Obviously Wheneither contactor is actuated, the circuits thereof are closed` by lits contacts, and the motor 25 is operated to rotate the feed screws 33 in the correct direction to cause the desired lateral movement of the cylinder and ram.

Having thus described my invention, what I claim is:.. 1,

1. In `a riveting machine, the combination with the cylinder, the reciprocating ram, the lateral feeding means and the worktable thereof, of an auxiliary feeding attachment comprising a compensating device carried by said cylinder for controlling said feeding means, said device having'a stationary mounting plate, a laterally reciprocating bracket carried by said plate, an oscillating arm carried by said plate, a laterally fixed guide member carried by said worktable,

said arm having its lower end in engagement with said laterally fixed member, switch means carried by said bracket and actuated by movement of said oscillating arm, said switch means being associated with said feeding means to cause said cylinder and said ram to be moved laterally of said worktable, and means carried by said ram and actuated during the working stroke thereof for causing said feeding means to be operated.

2. In a riveting machine, the combination with the cylinder, the reciprocating ram, the lateral feeding means, and the worktable thereof, of an auxiliary feeding attachment comprising a compensating device carried by said cylinder for controlling said feeding means, said compensating device having a nxed member and a movable member, a stationary guide member carried 'by said worktable, an oscillating arm carried by said movable member and having its lower end in engagement with said stationary member, and a templet device co-operating withsaid compensating device, and having a templet bar coacting with the movable member of said compensating device to cause lateral movement thereof.

3. In a riveting machine, the combination with the cylinder, the reciprocating ram, the lateral feeding means, and the worktable thereof, of an auxiliary feeding attachment comprising a compensating device carried by said cylinder for controlling said feeding means, said compensating device having a fixed member and a movable member, a stationary guide member carried by said worktable, an oscillating arm carried by said movable member and having its lowerend in engagement with said stationary member, and a templet device co-operating with said compensating device, said templet device comprising a stationary guide carried by said ram, a slipper adjustably mounted upon said guide, and a templet bar adjustably carried by said slipper and associated with the movable member of said compensating device to cause lateral movement thereof. v4. In a riveting machine, the combinatio with the cylinder, the reciprocating ram, the lateral feeding means, and the worktable thereof, of an auxiliary feeding attachment comprising a compensating device carried by said cylinder g for controlling said feeding means, ,said compensating device having a fixed member anda movable member, a stationary guide i member carried by said worktable, an oscillating arm carried by said movable member and having its lower end in engagement with said stationary member and a templet device co-operating with said compensating device, said templet device comprising a stationary guide carried by said ram, a gauge bar detachably carried by said guide and formed with a'plurality of predetermined apertures, a slipper mounted upon said guide, detent means carried by said slipper for engagement with one ofthe apertures of said gauge bar, and a templet bar adjustably carried by said slipper and cooperating with the movable member of said com- Vpensating device to cause lateral movement thereof.

5. In a riveting machine, the combination with the cylinder, the reciprocating ram, the lateral feeding means and the worktable thereof, of anauxlliary feeding attachment comprising a compensating device carried by said cylinder for controlling said feeding means, said compensating device having a xed member and a movable member, a stationary guide member carried by said worktable, an oscillating arm carried by said movable member and having its lower end in engagement with said stationary .member and a templet bar carried by said ram 'having' a. .downwardly extending arm,

.7 `sating device having axe'd member. andv amovabl'eine'mber,` a stationary guide member carried bysaid. worktable, an oscillating arm carried, lby saaidmovable member and` hai/"ingI its.` lower end ifiiengagementwithsaid stationary member and azltemplet b'a-il carried by; said ranrand.` coacting .withsisa-idlcompensalting device, saidlvtemplet bar having twci` spaced Working surfaces lying"` in .Space'daparallel planes andbeing connectedlby? an inclined surface, said working surfaceshaving :so-operative` connection with. the moyablememf beiffoff said compensating device to cause lateral relative movement of saidcylinder andi ram as said ramy moves on its Working stroke..

7.-.A feeding attachment for riveting machines, i f

comprising a' compensating device, comprising a Stationary member, a. reciprocatingmember `carme@ 'by' said stationary member, an oscillating drm `carried by said reciprocatingmember and lhaving a. downwardly extending arm, spring means for urging `said arm in one direction,

Switchhmeansmounted upon said movable memandi actuated by theI oscillating movement of said' arm, -saidy attachment having, a .templet devicesmovable relatively with saidl compensating devflce,-.said temp'let device comprising a stationary guide, a slipper adjustably carried by said guide, and' a te'mplct bar carried by said slipper and coasting with: the movable `rncrr'xberof said compensatingdevice for causing lateral movemerit ofsaidattach-ment in relation to a workpiece4 When said devices. are moved relatively.

'8; Alfeeding attachment for riveting machines, comprising a. compensating device, comprising `a stationary member,` a reciprocating member carried vbyr` said stationary member, an oscillating arntcarried'by said reciprocating member and SpImg means for urging said arm. in one direction, swlitchmeans mou-nted'upon said movable member `and actuated by the oscillating movement cfi:s'aidarm, said attachment having a templet deviceinovable relatively withfsaid compensating idevicfe, said' templet device comprising a stationguide: andiorm'ed with a plurality-of apertures,

a' slipperm'ounted upon said guide,v detent means carried bysaid slipper for eng'fiierrxent-y With one o'i'i't-h'e apertures' of said gauge bar, andra templet bar adjustably carried by said slipper and. co-

8 operat'in'gl4 with the'movable mem-ben off' said com? pensating device to cause lateralfniovement of said;l attachment inA relation to a .workpiecewhen said devices move relatively.

9; In a riveting machine', the'y combination with :th-efcylinder, the vreciprocating` ram', and` the lateral: feeding means thereof; ofi an. auxiliary feedingattacliment comprising a compensating device mounted upon saidl cylinder for contrat ling said feedingmeans land having-a, part en:- gfageable With a workpiece, saiddevice ,havinga stationary mounting'plate, alaterally reciprocate iiig bracket carried by said plate, means carried byI said'rrarn and, cop-operating withsaid. compensating device for causing said-.1 bracket tov be moved relatively to said cylinder inllateralfdirece t'ion, andelectric switch means, carriedbyfs'aid liracketl and actuated by the reciprocating move,i mentwof said bracket to. causesaidf, cylinder; and saidram/to be `moved laterally -by said feeding means. ,l

JOHN-DREW..

REFERENCES. CITED The following references are ofl recordinf the YVfile ofvthis patent:

UNI-TED STATES PATENTS Number Name `Date v 501,273 Hart-ness July 121,118.93 1,041,442' Devinek ah- Cet.n 1:'5, 1191-2 11,241,257 Wuyts-et a1.. sept. 25,1911? 1,444,909 Gail ieee Feb. 13;-1923 1,616,152' 'vI-'hacher Feb. 1, 11927 1,678,924 Srtrindberg July 31,1928 13,763,745 Bayer et al. June 17, 1.930 '1,769,787 Kehoey v 1, 13930 V1,878,520 Hughes Sept. "20, 1932 integers Wilcox A vl Nov; '1, 1932 2,110,593- Ernst M f Mari 8,1938 2,113,367 'Beldenet al. -s Apr-.#5, 1938 2,334,956 Nov.- 23, 1943 l`2",:'i50,o65 Parker .lnni Maven, A1944 21,416,055 Jolindrew l Feb'. 116, 1947 e, FOIGN PATENTS Number Country Date 55,991 switzerland -.f Mar. v29, 1 911 379,172 Germany ;l 123 Certificate of Correction Patent No. 2,456,126. December 14, 1948. y

WILBUR JOHNDREW It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Column 3, line 27, after extends insert the Words substantially the fall length of the spar 71, is arranged; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflce.

Signed and sealed this 19th day of April, A. D. 1949.

THOMAS F. MURPHY,

Assistant Uommz'ssz'oner of Patents. 

